Updated POI copyright to 2015

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1661336 13f79535-47bb-0310-9956-ffa450edef68

legal/NOTICE

@@ -1,5 +1,5 @@
 Apache POI
-Copyright 2003-2014 The Apache Software Foundation
+Copyright 2003-2015 The Apache Software Foundation
 
 This product includes software developed by
 The Apache Software Foundation (http://www.apache.org/).